Paper bag



rates PAPER BAG.

SPECIFICATION forming part of Letters Patent No. 234,838, dated November 23, 1880.

(No model.)

To all whom it may concern Beitknown that I, DANIEL APPEL, of Cleveland, county of Cuyahoga, State of Ohio, have invented an Improvement in the Manufacture of Paper Bags, of which the following description, in connection with the accompanying drawings, is a specification.

This invention relates to satchel-bottom paper bags and the method of forming and preparing the same for pasting and subsequent packaging.

In this niyinvention one ply at the end of a pasted tube is folded or turned back within the tube while the latter is supported by a former located within the tube, and then, by means of a tucking-blade or device bearing upon the outer side of the tube and a blade, plate, or equivalent within the open end of the tube, the latter is center-creased 011 the line a: w to form the usual central fold, after which the open end of the tube is expanded laterally in the direction of the width of the tube, which thus causes the other or upper ply at the leading end of the tube to be brought down upon the end of the under ply first formed, the two ends of the said two plies meeting transversely across the tube.

I prefer to apply the paste directly upon the inner faces of the corner-laps by means of rollers, and to do this I fold the tubular paper longitudinally upon itself by the creases or otherwise near the tube edges, the said creases being made at a distance from each edge equal to the distance from the free point of the corner-lap to its junction with the body of the tube. In this condition the tubular piece of paper will leave the corner-laps, formed by expanding the tube as described, projecting beyond the edges of the tube, the said corner-laps resembling small triangles. This longitudinal folding of the tube, besides aiding in forming the corner-laps to be pasted, is also of very material advantage, inasmuch as the bagfolded longitudinally within its side edges has its width decreased, thus bringing the bag into most compact shape for packaging and shipping. The corner-laps having been pasted, they are turned over upon the square portion of the bag-bottom.

Figure 1 represents, in top View, the end of a thin plate or former, a, shaped as I prefer to use it in the manufacture of this bag; Fig. 2, a top view of a length of tube, 1), sufficient for one bag, the longitudinal lap-seam being supposed to be at the under side of the tube, the line 00 00 indicating the location of the central crease for the satchel-bottom, the said figure also showing, by the dotted lines 2 2, the lines on which the bag will be folded for packaging or preparatory to throwing out the cornerla-ps; Fig. 3, a top view of the tube as it will appear after the lower ply, c, of the leading end of the tube has been folded back over the end of the former, thus making the fold correspond to the first cross-fold of the diamond in an ordinary bag and within the end of the tube, the upper ply having been turned backward upon the tube, thus forming the central crease, a" a', a tucker or blade then touching the upper ply of the tube; Fig. 4, a top view, showing the open or leading end of the tube as expandedlaterally from the position shown in Fig. 3, such expansion causing the end 00f the upper ply of the tube to be brought forward and down upon the turned-in part of the under ply and laying the corner-laps 4; Fig. 5, an end view of Fig. 4. Fig. 6 represents the tube of Figs. 4 and 5 folded along the dotted lines 2 2, the upper triangular portions or corners, Figs. 4 and 5, being left as extending from the tube laterally outside the lines 2, ready to be pasted by passing said corners between rollers; Fig. 7, an end view thereof. Fig. 8 represents, in top View, a bag with the corner-1aps of Fig. 6 turned over to complete the bag-bottom and leave the bag in its most compact form for packaging; and Fig. 9 is a modification to be referred to.

I propose to file an application for a patent in which I shall show and claim automatic mechanism for forming bags after the method hereinbefore described.

The series of parallel dashes represent paste. Some of the steps described in this case, but not claimed, are described and claimed in another applicaiion for United States Patent, designated as Case D, filed by me concurrently with this.

Instead of folding the tube longitudinally along the lines 2 when in the condition shown at Figs. 4 and 5, I may turn the upper triangular corners 4 over upon and paste them to the square part of the bottom, and then, if desired, fold the paper bag along the lines 2 2; or with the parts as in Fig. 3 I may fold the tube under upon itself along the lines 2 2, leaving it in the condition shown in Fig. 9, after which the side laps, h, may be expanded laterally beyond the then side edges of the tube, causing the upper ply to move forward and downward and the triangular corners to be projected just as in Fig. 6.

The foregoing description of the various steps taken in the manufacture of the paper bag will enable one conversant with bag-making to readily understand my present method of folding or forming the bag-bottom; but I will summarize the said method by stating that while the tube b rests about the former a one ply of itviz., the under plyis turned back within the open advance end of the tube by a suitable blade on one side and the end of the former on the other side of the ply, and the upper ply, acted upon at its inner face, preferably, by the same blade and upon its outer face by another blade or instrument, is turned back upon itself, bringing the bottomforming parts into the position shown at Fig. 3. In that condition the inner portion of the upper ply is acted upon to expand the advance end of the tube and cause the upper ply to be brought toward and down upon the portion'of the under ply first turned in, placing the parts as in Figs. 4; and 5, after which the corners of the paper formed by expanding its advanced end, having been pasted, are turned over upon the other corners of the bag-bottom previously pasted together. Folding the tubular blank, Fig. 4, longitudinally upon the lines 2 2 causes the corner-folds to project beyond the then side edges of the blank, as in Fig. 6, to permit the said corners to be pasted by passing them between rollers.

It is obvious that the final result obtained in the bag-bottom will be the same it the blank should be folded longitudinally on the lines 2 2 just before the upper ply was expanded and brought down, as described.

I claim-- 1. That improvement in the art or method of making satchel-bottom paper bags which consists in turning one ply of the paper at one end of the tube inward within the tube, thus forming the cross-fold nearest the end of the bag, then laying the upper ply back on. the tube, thus forming the central crease or fold for the bag-bottom, then expanding the upper ply of the open end of the tube between the two longitudinal lines 2 2 in the direction of the width of the tube to form the corner-laps, and lay the upper ply of the leading end of the tube down upon'the end of the under ply first turned into the tube, as before described.

2. That improvement in the art or method of manufacturing a paper bag from a tube which includes the following steps, viz: turning the end of the under ply of the paper at the leading end of the tube inward within the tube, laying back the upper ply of the tube upon itself, expanding laterally the upper ply of the paper at the open leading end of the tube to bring the advance end of the upper ply down upon the end of the under ply first turned back to form the corner-laps, creasing or folding the tube longitudinally parallel with and near its side edges, so as to leave the corner-laps projecting, and finally laying the corner-laps over upon and pasting them to the bottom part of the bag, substantially as described.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

DANIEL APPEL.

i/Vitnesses G. W. GREGORY, N. E. G. WHITNEY. 

